The design involves the creation of 420,000 sq ft of workspace and 20,000 sq ft of retail, while retaining 90% of the existing structure, keeping the carbon impact as low as possible.

The project is targeting BREEAM Outstanding, WELL Platinum.

The building will have 50% less embodied carbon than a typical office building of a comparable size and exceeds the Greater London Authority’s (GLA) carbon targets.

Further to this, One Exchange Square will be 100% electric and net zero carbon in operation, using intelligent façade design and mechanical services twinned with building management systems to limit operational energy use.

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Having designed the original masterplan for the Bishopsgate quadrant of Broadgate, Fletcher Priest are delighted to return to this area of the city following successful recent interventions at 135 and 155 Bishopsgate.

The project furthers the company’s commitment to minimising embodied and operational carbon through extensive reuse and enhancement of three quarters of the existing façade whilst creating an intelligent envelope design to the Exchange Square façade presenting a new face to the City.

Roof extensions will be built to form a new contemporary silhouette and provide higher quality space for occupants with outdoor terraces.

Over 33,000 sq ft of external gardens on terraces and balconies provide easy engagement with nature for all occupiers.

The terraces, which can be accessed from every level of the building, will exceed the City of London Urban Greening Factor target and provide habitats for native species.

Work on One Exchange Square is due to begin in 2023, with completion expected in 2025.